The total investment in the production line of aerated blocks is 5 million yuan, and the investment in hollow bricks ranges from tens of thousands to hundreds of thousands of yuan, and the raw materials used in the two types of bricks are also different. Hollow bricks generally refer to non-burning bricks. The domestic specifications are generally 390* 190*190. The weight is relatively heavy, so high-level fillers are not used. The specification of aerated block is: 600*200*250 600*300*100 600*150*100. Hollow bricks are divided into cement hollow bricks, clay hollow bricks, and shale hollow bricks. In the 5.8-magnitude earthquake that occurred in Yingjiang, Yunnan in March 2011, houses using hollow cement bricks collapsed, resulting in many deaths. Due to safety hazards, Yunnan plans to ban cement hollow bricks, and the use of cement hollow bricks in real estate under construction in Qingdao, Shandong has also been suspended. Professional opinions in the construction industry believe that prohibiting the use of such statements is unscientific and is a layman's practice. It will mislead the public and must be corrected. Hollow brick is just a kind of building material, and it is no problem to use it in a scientific way. The use of hollow bricks is very scientific, and the quality requirements are also high. Whether the foundation is suitable for the use of hollow bricks, how to design it, and whether there are problems with cement and other related ingredients during construction are all relevant. It is no problem to use qualified hollow bricks according to strict procedures and scientific use, strictly implementing the relevant national standards. For the same reason, if the relevant national standards are not strictly implemented in the use of solid bricks, problems will also occur. Aerated block is a new type of lightweight and porous building material. The aerated block produced by the aerated block equipment has the advantages of light bulk density, high insulation efficiency, good sound absorption and processing. It can be made into wall blocks, insulation blocks, and pressure Panels, floor slabs, wall panels and thermal insulation pipes and other products, aerated blocks have been widely used in industrial and civil buildings in load-bearing or non-load-bearing structures and pipeline insulation in China, becoming an important part of new building materials. Aerated blocks are divided into fly ash aerated concrete blocks and sand aerated concrete blocks. Fly ash autoclaved aerated concrete blocks are easy to use in construction projects due to their high water absorption and drying shrinkage. There are problems such as wall cracks, hollow drums falling off, etc.